struct PK_SURF_create_blend_o_s
    {
    int             o_t_version;    --- version number of option structure
    PK_LOGICAL_t    have_help;      --- (PK_LOGICAL_false)
    PK_VECTOR_t     help;           --- help vector
    PK_LOGICAL_t    have_box;       --- whether box provided (PK_LOGICAL_false)
    PK_BOX_t        box;            --- box of interest
    };

typedef struct PK_SURF_create_blend_o_s PK_SURF_create_blend_o_t;



Holds optional data for creating blend surfaces.


The option structure defines data which could help in the creation of a blend
surface.